LOS ANGELES (Reuters) - Lisa Marie Presley, Elvis Presley's only child, gave birth to twin baby girls on October 7, celebrity news TV show "Entertainment Tonight" said on its website on Saturday.

The girls, whose names were not given, were delivered by cesarean section and weighed 5 pounds, 15 ounces (2.7 kg) and 5 pounds, 2 ounces (2.3 kg).

The twins are the first children born to Presley, 40, and her musician husband Michael Lockwood, 47.

Presley also has two children with ex-husband Danny Keough. After that union ended in 1994, she briefly married Michael Jackson and then actor Nicolas Cage.

Twins run in the Presley family. Her father, who died in 1977, was a twin and her mother, Priscilla Presley, has younger brothers who are twins, ET said.

Presley is following in the musical footsteps of her father. Last year she released a version of Elvis' "In the Ghetto," a posthumous duet with her dad.

(Reporting by Lisa Baertlein; Editing by Xavier Briand)